What Is Lewy Body Dementia?

In this article

Causes

Lewy bodies, named after the scientist who discovered them, are made of a protein called alpha-synuclein. When they build up, they keep your brain from making the right amount of two important chemicals. One of them, called acetylcholine, affects your memory and learning. The other, called dopamine, affects how you move, your mood, and your sleep.

Scientists aren’t sure what makes Lewy bodies start to build up in the brain. They’re also not sure why some people get LBD and others don’t.

Some health conditions worsen your odds of getting the condition. People with Parkinson’s disease or REM sleep behavior disorder have a higher risk of LBD.

Symptoms

Not everyone will have the same warning signs. They often depend on the type of LBD you have. They might be mild or get worse at times.

Getting a Diagnosis

There is no one test that can diagnose LBD. Because it’s similar to other types of dementia, it’s hard for doctors to identify it, especially in the early stages. So they often try to rule out other health problems that might cause the same symptoms.

Your doctor might do a few tests, including:

Ask you about your medical history and do a physical exam

Blood tests that check the levels of hormones or vitamins in your body. The wrong amounts can cause other types of dementia.

CT scan or MRI scan of your brain to spot changes caused by other dementias